/* ============================================
   節點傳媒科技 Node Media Tech — 全站樣式
   ============================================ */
:root{
  --bg:#0D1117;
  --panel:#121A26;
  --panel-2:#0F1520;
  --line:rgba(233,238,245,.09);
  --ink:#E9EEF5;
  --muted:#96A3B4;
  --purple:#8B5CF6;
  --blue:#00C2FF;
  --mint:#7FE7C4;
  --pink:#D98BE0;
  --grad:linear-gradient(110deg,var(--purple) 0%,var(--blue) 55%,var(--mint) 100%);
  --radius:16px;
  --wrap:1120px;
}
*{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  background:var(--bg);
  color:var(--ink);
  font-family:"Noto Sans TC",-apple-system,"PingFang TC","Microsoft JhengHei",sans-serif;
  font-size:17px;line-height:1.75;
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}
img{max-width:100%;display:block}
a{color:inherit;text-decoration:none}
.wrap{max-width:var(--wrap);margin:0 auto;padding:0 24px}

/* ---------- 字體角色 ---------- */
.serif{font-family:"Noto Serif TC","Noto Sans TC",serif}
.mono{font-family:"IBM Plex Mono",ui-monospace,monospace;letter-spacing:.22em;text-transform:uppercase;font-size:12px;color:var(--blue)}
h1,h2,h3{font-family:"Noto Serif TC","Noto Sans TC",serif;font-weight:700;line-height:1.3}
.grad-text{background:var(--grad);-webkit-background-clip:text;background-clip:text;color:transparent}

/* ---------- 導覽列 ---------- */
.nav{
  position:fixed;top:0;left:0;right:0;z-index:100;
  background:rgba(13,17,23,.72);
  backdrop-filter:blur(14px);-webkit-backdrop-filter:blur(14px);
  border-bottom:1px solid var(--line);
}
.nav-inner{max-width:var(--wrap);margin:0 auto;padding:0 24px;height:68px;display:flex;align-items:center;justify-content:space-between}
.brand{display:flex;align-items:center;gap:12px;font-family:"Noto Serif TC",serif;font-weight:700;font-size:19px;letter-spacing:.12em}
.brand svg{width:44px;height:30px;flex:none}
.nav-links{display:flex;gap:34px;align-items:center;font-size:15px}
.nav-links a{color:var(--muted);transition:color .25s;position:relative;padding:6px 0}
.nav-links a:hover{color:var(--ink)}
.nav-links a.active{color:var(--ink)}
.nav-links a.active::after{content:"";position:absolute;left:0;right:0;bottom:-2px;height:2px;background:var(--grad);border-radius:2px}
.nav-cta{background:var(--grad);color:#0B0F14;font-weight:700;padding:9px 20px;border-radius:999px;font-size:14px;transition:opacity .25s,transform .25s}
.nav-cta:hover{opacity:.9;transform:translateY(-1px)}
.menu-btn{display:none;background:none;border:1px solid var(--line);color:var(--ink);border-radius:10px;padding:8px 12px;font-size:18px;cursor:pointer}

/* ---------- 首頁 Hero（品牌橫幅） ---------- */
.hero-banner{position:relative;margin-top:68px}
.hero-banner img{width:100%;height:auto;min-height:320px;object-fit:cover;object-position:center}
.hero-banner::after{content:"";position:absolute;inset:auto 0 0 0;height:38%;background:linear-gradient(to bottom,transparent,var(--bg))}

.hero-copy{padding:64px 0 40px;text-align:center;position:relative}
.hero-copy h1{font-size:clamp(30px,5vw,52px);letter-spacing:.06em;margin:18px 0 20px}
.hero-copy p{color:var(--muted);max-width:620px;margin:0 auto 36px;font-size:clamp(16px,2vw,19px)}
.btn-row{display:flex;gap:16px;justify-content:center;flex-wrap:wrap}
.btn{display:inline-flex;align-items:center;gap:8px;padding:14px 34px;border-radius:999px;font-weight:700;font-size:16px;transition:transform .25s,opacity .25s,border-color .25s}
.btn:hover{transform:translateY(-2px)}
.btn-primary{background:var(--grad);color:#0B0F14}
.btn-ghost{border:1px solid var(--line);color:var(--ink)}
.btn-ghost:hover{border-color:var(--blue)}

/* ---------- 節點連線標題（品牌記號） ---------- */
.node-mark{display:flex;align-items:center;justify-content:center;gap:0;height:26px}
.node-mark svg{width:150px;height:26px;overflow:visible}
.node-line{stroke:url(#nm-grad);stroke-width:2;fill:none;stroke-dasharray:200;stroke-dashoffset:200;animation:draw 2.4s ease forwards}
.node-dot{fill:var(--blue)}
.node-dot.p{fill:var(--purple)}
@keyframes draw{to{stroke-dashoffset:0}}

/* ---------- 區塊通用 ---------- */
section{padding:88px 0}
.sec-head{text-align:center;margin-bottom:56px}
.sec-head h2{font-size:clamp(26px,3.6vw,38px);letter-spacing:.08em;margin:14px 0 12px}
.sec-head p{color:var(--muted);max-width:560px;margin:0 auto}

/* ---------- 服務卡片 ---------- */
.grid-3{display:grid;grid-template-columns:repeat(3,1fr);gap:22px}
.card{
  background:var(--panel);border:1px solid var(--line);border-radius:var(--radius);
  padding:34px 28px;position:relative;overflow:hidden;
  transition:transform .3s,border-color .3s;
}
.card::before{content:"";position:absolute;top:0;left:0;right:0;height:2px;background:var(--grad);opacity:0;transition:opacity .3s}
.card:hover{transform:translateY(-5px);border-color:rgba(0,194,255,.35)}
.card:hover::before{opacity:1}
.card .icon{width:46px;height:46px;border-radius:12px;display:flex;align-items:center;justify-content:center;background:rgba(139,92,246,.12);margin-bottom:20px;font-size:22px}
.card h3{font-size:20px;letter-spacing:.05em;margin-bottom:10px}
.card p{color:var(--muted);font-size:15px}
.card .tag{margin-top:16px;display:inline-block;font-family:"IBM Plex Mono",monospace;font-size:11px;letter-spacing:.18em;color:var(--mint);text-transform:uppercase}

/* ---------- 三步驟（節點方法） ---------- */
.steps{display:grid;grid-template-columns:repeat(3,1fr);gap:22px}
.step{background:var(--panel-2);border:1px solid var(--line);border-radius:var(--radius);padding:34px 28px;text-align:center}
.step .num{font-family:"IBM Plex Mono",monospace;font-size:13px;letter-spacing:.3em;color:var(--purple);display:block;margin-bottom:14px}
.step h3{font-size:20px;margin-bottom:10px;letter-spacing:.06em}
.step p{color:var(--muted);font-size:15px}
.step-arrow{display:flex;align-items:center;justify-content:center;color:var(--blue)}

/* ---------- CTA 帶 ---------- */
.cta-band{
  background:
    radial-gradient(560px 260px at 18% 20%,rgba(139,92,246,.22),transparent 65%),
    radial-gradient(560px 260px at 82% 80%,rgba(0,194,255,.18),transparent 65%),
    var(--panel);
  border:1px solid var(--line);border-radius:24px;
  padding:66px 40px;text-align:center;
}
.cta-band h2{font-size:clamp(24px,3.4vw,34px);letter-spacing:.08em;margin-bottom:14px}
.cta-band p{color:var(--muted);margin-bottom:32px}

/* ---------- 內頁 Hero ---------- */
.page-hero{
  margin-top:68px;padding:96px 0 64px;text-align:center;
  background:
    radial-gradient(700px 320px at 50% -10%,rgba(139,92,246,.16),transparent 70%),
    radial-gradient(500px 240px at 85% 10%,rgba(0,194,255,.10),transparent 70%);
}
.page-hero h1{font-size:clamp(30px,4.6vw,46px);letter-spacing:.1em;margin:18px 0 14px}
.page-hero p{color:var(--muted);max-width:600px;margin:0 auto}

/* ---------- 關於我們 ---------- */
.about-split{display:grid;grid-template-columns:1.05fr .95fr;gap:56px;align-items:center}
.about-split h2{font-size:clamp(24px,3vw,32px);letter-spacing:.08em;margin:12px 0 18px}
.about-split p{color:var(--muted);margin-bottom:16px}
.about-visual{border-radius:var(--radius);overflow:hidden;border:1px solid var(--line)}
.value-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:22px}

/* ---------- 聯絡我們 ---------- */
.contact-grid{display:grid;grid-template-columns:1fr 1fr;gap:24px;max-width:820px;margin:0 auto}
.contact-card{
  background:var(--panel);border:1px solid var(--line);border-radius:var(--radius);
  padding:42px 32px;text-align:center;transition:transform .3s,border-color .3s;
}
.contact-card:hover{transform:translateY(-4px);border-color:rgba(0,194,255,.35)}
.contact-card .big-icon{font-size:40px;margin-bottom:16px}
.contact-card h3{font-size:21px;letter-spacing:.06em;margin-bottom:8px}
.contact-card .value{font-family:"IBM Plex Mono",monospace;font-size:15px;color:var(--mint);margin-bottom:22px;letter-spacing:.04em}
.copy-btn{background:none;border:1px solid var(--line);color:var(--muted);border-radius:999px;padding:8px 18px;font-size:13px;cursor:pointer;margin-top:12px;transition:color .25s,border-color .25s;font-family:inherit}
.copy-btn:hover{color:var(--ink);border-color:var(--blue)}
.contact-note{max-width:820px;margin:40px auto 0;text-align:center;color:var(--muted);font-size:15px}

/* ---------- 頁尾 ---------- */
footer{border-top:1px solid var(--line);padding:52px 0 40px;margin-top:20px}
.footer-inner{display:flex;justify-content:space-between;align-items:flex-start;gap:32px;flex-wrap:wrap}
.footer-brand{display:flex;align-items:center;gap:10px;font-family:"Noto Serif TC",serif;font-weight:700;letter-spacing:.12em;margin-bottom:10px}
.footer-brand svg{width:38px;height:26px}
.footer-sub{color:var(--muted);font-size:13.5px;font-family:"IBM Plex Mono",monospace;letter-spacing:.14em}
.footer-links{display:flex;gap:26px;font-size:14.5px}
.footer-links a{color:var(--muted);transition:color .25s}
.footer-links a:hover{color:var(--ink)}
.footer-contact{color:var(--muted);font-size:14.5px;line-height:2}
.footer-contact a{color:var(--blue)}
.copyright{text-align:center;color:#5B6774;font-size:13px;margin-top:40px;letter-spacing:.06em}

/* ---------- 進場動畫 ---------- */
.reveal{opacity:0;transform:translateY(22px);transition:opacity .7s ease,transform .7s ease}
.reveal.in{opacity:1;transform:none}
@media (prefers-reduced-motion:reduce){
  .reveal{opacity:1;transform:none;transition:none}
  .node-line{animation:none;stroke-dashoffset:0}
  html{scroll-behavior:auto}
}

/* ---------- 響應式 ---------- */
@media (max-width:900px){
  .grid-3,.steps,.value-grid{grid-template-columns:1fr 1fr}
  .about-split{grid-template-columns:1fr;gap:36px}
  .step-arrow{display:none}
}
@media (max-width:640px){
  section{padding:64px 0}
  .grid-3,.steps,.value-grid,.contact-grid{grid-template-columns:1fr}
  .nav-links{
    display:none;position:absolute;top:68px;left:0;right:0;
    background:rgba(13,17,23,.97);border-bottom:1px solid var(--line);
    flex-direction:column;gap:0;padding:10px 0;
  }
  .nav-links.open{display:flex}
  .nav-links a{padding:14px 24px;width:100%}
  .nav-links a.active::after{display:none}
  .nav-cta{margin:12px 24px}
  .menu-btn{display:block}
  .hero-banner{margin-top:68px}
  .hero-banner img{content:url("banner-mobile.jpg")}
}